Stenciling material



E. W. HILL.

STENCILING MATERIAL. APPLICATION FILED FEB- 27, 1 920- mwmqm Patented M.n, m.

I "ii III are quickly secured to the carrier-sheet when I IIElDlD W.HILL, CI CHICAGO, ILLINOIS, ASSIGIICR 'IO A. B, 1910 COMPANY, OF

CHICAWC, ILLINOIS, fl- CORPORATION CI IIJLINUIS:

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Specification of LettersJPatent. Patigntgdl'fimt 111 1921 applicationfiled February .37, 1920. serial No. 3611,7141.

To all whom it mag concern:

Be it known that I, EDWARD W. HILL, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Stencilin -Mat erial,,of which the following is. a speci cation.

My invention relates to stenciling mate'- rial, and particularly to anovel form of carrier-sheet and to the combination of such a sheet witha stencil-sheet positioned thereon, with or without an'absorbentbackingsheet or fluid-receiving pad interposed between the carrier andstencil-sheets.

My invention is particularly intended for use in connection withstencil-sheets of a dry but hygroscopic character, which are generallymoistened before use, such, for example, as those described in PatentNo. 1,101,258, granted June 23, 1914. I have found that in such stencilsheets, when combined with other dry sheets such as an absorbentbacking, a paper carrier-sheet or the like, there is a tendency todeteriorate, largely because of the passage of elements of theimpregnating composition of the stencilsheet into the adjacent sheetorsheets.

My invention overcomes this objection by providing a single, permanentcarrier-sheet for use with successive stencil-sheets, which the stencilis to be made, and detached therefrom when the stencil is to be put inthe duplicating mbchine. The stencil-sheets will be kept in massedcondition, that is, in stacks of stencil-sheets one upon the other,without any paper or other backings incontact with the same, until thestencils are to be made.

By this meansthey will lar ely be prevented massed in 'humidors,

from deterioration as by rying out. The

stencils after being written may'also be retained massed until wantedfor printing, and therefore kept in a desirably soft and pliantcondition. The unused stencil-sheets and the completed stencils may bekept if desired, inperfect condition for long periods.

.The carrier-sheet of, my invention 1s formed of a non-absorbentmaterial, celluloid being preferred because sheets of the same arenon-absorbent of the fluid used to soften the stencil-sheet, and becauseit has the necessary flexibility. It 'alsohas other I desirablequalities, including its hardness.

When a stencil is to be made, a stencil-sheet is secured on thecarrier-sheet, a moistened sheet of absorbent material being interposedbetween the two, the stencil-sheet being then stencilized by pressureas, for instance, by means of a stylus or the type of a writing machine.1 p

I have found that improved results of important character accrue fromthe use of a hard backing surface such as I propose to use. The stencilshave finer lines than when a softer backing surface is used, because ofwhich the characters are more distinct, sharper and more uniform, andthe Work generally has better finish and quality. Because 0 the finerlines, also, a lighter deposit of ink is made on the reproductions fromthe stencil, so that less time is required to dry the sheets, there isless halo about the letters, less offset, and less lack of uniformitybecause of the deeper penetration of certain typewriter characters thanothers. Other beneficial results obtained by the use of the inventionwill be referred to hereinafter. i r

In the preferred embodiment of my invention the stencil-sheet ispermanently secured at its upper end to a paper strip, .such as the stubof a paper carrier-sheet, which is provided with .keyhole slots. Thesemay be slipped over a row of bent tongues which extend upwardly from thesurface of the celluloid carrier-sheet. A guard or abutment strip isfastened on the carrier-sheet, or a continuation thereof as hereinafterdescribed, above' the projections, to be contacted by the upper edgeofthe stencil-sheet, to aid in proper y positioning the latter. Aflexible coverlng strip, preferably transparent, is arranged to coverthe bent tongues referred to,after the stencil-sheet has been attachedto the carrier-sheet thereby. A flexible strip of fabric or othersuitable material is secured to the upper or leading edge of thecarrier-sheet, to form a continuation thereof, to facilitate the drawingthrough the typewriter feed-rolls of the following portions of thecarrier and stencil-sheets with the interposed absorbent backingsheet.Other details of the construction will appe t1 more fully hereinar.

n order that my invention may be more clearl understood, attention ishereby directed to the accompanying drawings for celluloid, which may beobtained in sheets of uniform thickness, and-of a sufficient flexibilityto enable the same readily to be positioned in a typewriter. Preferably,if the sheet is of celluloid, its rear surface may be roughened as bysand-blasting, or provided with some friction means to prevent theslipping of the same inthe tyewriting machine. I have illustrated a pairof thin strips 2, 2, of rubber or the like, secured on the rear surfaceof sheet 1 for this purpose.

The celluloid carrier-sheet 1 preferably has a flexible strip 3 securedto the upper edge thereof to form an upward extension thereof. Thisstrip 3, which I may term a leader, is adapted to facilitate the drawingthrough the feed-rolls of a typewriting machine of the more bulkyportions of the carrier-sheet and parts carried thereby. It ispreferably somewhat thinner than the car'- rier-sheet 1 proper, andisformed of any suitable material such as rubberized cloth. It may besecured to the carrier-sheet 1. by lines of stitchin 4. v The carrier-sleet is provided adjacent its upper edge with suitable means fordetachably securing the stencil-sheet thereto. Such securin meanspreferably take the form of a row 8f tongues 5 which are formed integralwith the upper edge of the celluloidsheet 1, these tongues extendingforwardly through openings in the leader 3 and being bent upwardly onthe front side of the same. I

The stencil-sheet. 6 is preferably of the type disclosed in Patent No,1101258 referred to, and may consist of a dr but hygroscopic sheet offibrous materia impregnated with coagulated protein. My invention isnotlimited to the use of a stencilsheet of this character, however,since various advantages may be obtained from the invention when othertypes of stencil-sheet are used. 7 Inthe embodiment of 'my inventionillustrated, the stencil-sheet is'secured at its upper-Ledge to a. strip7 of varnished paper which is provided with a horizontal series ofopenings ,8 through which the tongue or projections 5 on thecarrier-sheet are adapted to be inserted. The stencil-sheet 6 may besecured to said strip along its upper edge by the stencil-sheet on thecarrier-sheet.

adhesive material or otherwise. The openings 8 in the stub 7 arepreferably slots of a keyhole shape, so that the stencil-sheet when cutmay be fastened in position on the drum of a rotary duplicating machinein the usual way.

A guard or abutment strip 9 is preferably secured-in horizontal positionupon the face of the leader 3 immediately above the upwardly extendingtongues 5. hen the stencil-sheet is positioned on the carriersheet byslipping the tongues 5 through the slots 8, the upper edge of the stub 7of the stencil-sheet will register with the lower edge of the strip 9 soas to properly a llipe ie abutment 9 need, of course, not be acontinuous strip.

The front face of the carrier-sheet 1 is preferably provided withlimitation lines 10 adjacent its top, bottom and side edge with indexfigures 11, or other suitable indicia. printed adjacent to the lines 10.These indicating lines and figures are for the purpose of aiding in thespacing of the stencil work done and to keep such work within thelimitsof the printing capacity of the duplicating machines employed.These indicia should be visible to the operator during the act of makinga stencil, either by showing through the stencil or by appearing beyondcertain edges of the stencil-sheet.

A flexible covering strip 12 is secured to the front face of the leader3 so as to normally lie over the tongue or slot securing devices for thestencil sheet, as well as the abutment strip 9. The covering strip 12 ispreferably transparent and may conveniently be formed of celluloid. Itis secured along its upper edge to the leader 3 as by horizontal rows ofstitching 13. In its normal position it lies flat over the stub 7 of thestencil-sheet together with the tongues 5 and the abutment strip 9, soas to protect these parts while the device is being drawn through atypewriting machine. The protective strip 12 may be raised when thestencil-sheet is to be secured in position or detached. When it is inits covering position it aids in holding the stencil-sheet in position,the tongues and slots, abutment strip 9, and to some extent theprotective strip12, all co-operating to prevent shifting of position ofthe stencil-sheet after it is attached to the carrier-sheet, thestencil-sheet thus being attached to the carrier-sheet in a fixedposition relative to the limiting indicia of the carrier-sheet.

When the device is to be used the stencilsheet is attached to thecarrier-sheet, and if the stencilssheet is of the character whichrequires moistening before using, the stencil sheet islifted or thrownback and the backing-shcet 14 placed upon the carrier-sheet 1. Thisbacking-sheet is of absorbent maaseaaaa terial such as cloth, pa er orother fabric.

It is laid smoothly on t e carrier-sheet and stencil may be swung backinto position to lie upon the vsame and to receive moisture therefrom.The carrier-sheet 1 is entirely non-absorbent, so that all ofthefluidwill be effective for moistening the stenciling sheet. When the stencilhas been cut, it may be unfastened from the carrier-sheet and positionedin ,a duplicating machine whenever desired.

By the use of a material such as celluloid, which is naturallynon-absorbent, for the carrier-sheet, a higher degree of protectionagainst damage of the same'by moisture is obtained than when avarnishedpaper car rier-sheet is used, while at the same time the cost ofindividual carrier-sheets as previously used is eliminated. The stubs 7may be scored so as to cause the same to conform.

to the contour of the cylinder of the duplicating machine, therebyeliminating the present method of bending them by; hand.

As previously stated, the use of the hard backing surface provided bythe carriersheet of celluloid or the like, results in acharacteristically fine lined stencil. Accordingly, the deposit of inkformedon duplicates will be lighter than in theprevious practice,because of which the deposit will be more readily absorbed. Thenecessity which now frequently arises to speed'the impression sheetsthrough a duplicating machine by an abnormally rapid turning of thecylinder, in order to prevent a heavy, mussy deposit of ink, will beentirely eliminated. The blotchy effects in portions of duplicating worksometimes seen, resulting from theaccidental spreading of moisture tothe back surface of the carrier-sheet, will be entirely eliminated.There will be less halo about the letters where lightweight papers'areused, and less oflset.

It should also be noted that the hard carrier-sheet afi'ords sufficientresistance to the impact of the type of a. typewriting machine appliedthrough the, stencil-sheet, to

make a good result no matter what the character of the interposedabsorbent backing sheet may be. It is, therefore, possible to 'use asthe backing-sheet a sheet of cloth mesh, similar to the material ofwhich a typewriter ribbon is composed, for the purpose. of obtainingresults which 'quite closely resemble the prints made by a typewritingmachine through anink ribbon. The hardness of thecarrier-sheet alsomakes easier the work of the typewriter operator in mak-, ing thestencil, in that capital letters and specialcha-racters will not have tobe struck twice, and no care will have to be taken to minimize heavyletter effects as in the case of such-type characters as 1,, r, t.

Similarly, troubles resulting from the use of a too soft platen on thetypewriter are eliminated. Where stencil-sheets have become tou hthrough deterioration, the necessary resistance for the type impact willbe available.

It will be understood that my invention is not limited to the exactdetails of construc-' tion described, but that the same is of a broadand comprehensive character, within the scope of the appended claims.

What I claim is z .1. In stenciling materiahthe combination of a hardflexible entirely non-absorbent carrier-sheet, a stencil-sheet of drybut hygroscopic character, and an absorbent backingsheet adapted to beinserted between said stencil and carrier sheets, said stencil andcarrier sheets being adapted and arranged forready and repeatedattachment to and detachment from each other.

2. In stenciling material, the'combination of a celluloid carrier-sheet'and a stencil-' sheet, said sheets being adapted and arranged for readyand repeated detachment from and attachment to each other, with thesltlencil-sheet superposed above the carrier-, s eet;

3. In stenciling material, the combination i of a flexible non-absorbentcarrier-sheet, of a hardness considerably greater than that of cardboardor paper, varnished or unvar- -nished, and a stencil-sheet of dry buthygroscalpic character, said sheets being arrange for ready attachmentto, and detachment from, each other.

4. In stenciling material, the combination of a celluloid carrier-sheet,a stencil-sheet of dry but hygroscopic character, said sheets beingadapted and arranged for ready. at-

tachment to and detachment -from each other,

and a separate absorbent .backing-she et, adapted to be inserted betweensaid carrler 'and stencil sheets. i

5. In stenciling material, a celluloid carrier-sheet having meansthereon for the readyand positive attachment'thereto of a stencil-shee.

6. In sten'ciling material, a flexible carrier-sheet adapted for usewith successive stencil-sheets, having means thereon for the readyattachment thereto of successive stencil-sheets, and guard means adaptedto pre-, vent shifting of position of a stencil-sheet on of successivestencil-sheets, and a flexible strip attached to said carrier-sheet, inposition to extend over, and be moved away from, said attachment means.

9. In stenciling material, a carrier-sheet of flexible non-absorbentmaterial having a hardness considerably greater than that of varnishedcardboard or paper, adapted for use with successive stencil-sheets, andhaving projections bent upwardly from the upper surface thereof forcooperation with a stencil-sheet in attaching the latter thereto, and aflexible strip attached on one edge thereof to said carrier-sheet tonormally cover said projections.

10. In stenciling material, a celluloid carrier-sheet, having means onthe rear surface thereof to prevent slipping thereof on a surface onwhich the same may be placed while a stencil is being made.

11. Instenciling material, a celluloid car; rier-sheet, adapted to havea stencil-sheet secured thereon, and a-flexible strip secured to theupper edge-thereof and forming an upwardly extendin continuationthereof, and adapted tofacilltate the drawing of said carriersheet and astencil sheet carried thereby, through the feed-rolls of' a typewritinmachine.

12. n stencilin 'material, acelluloid carrier-sheet, adapte to have astencil-sheet secured thereon, and a flexible leader strip of thinnermaterial than said carrier-strip, secured to the upper edge and formingan upwardly-extending continuation of said carrier-strip.

13. In stenciling material, a carrier-sheet of flexible material havingprojections adjacent its upper edge for cooperation with a stencil-sheetin attaching the latter thereto, a flexible leader strip secured to theupper edge of said carrier-sheet to form a continuation thereof, and aflexible strip at- -tached at one edge thereof to said leader strip injectlons.

14. In stenciling material, a carrier-sheet position to normally coversaid proof flexible material having projections adj acent its upper edgefor cooperation with a stencil-sheet in attaching the latter thereto, anabutment strip on said carrier-sheet adjacent said projections, againstwhich the edgeof a stencil-sheet may abut, and a trans-- parent flexiblestrip attached at one edge to said carrier-sheet in position to normallyextion of a carrier-sheet, flexible and non-ab sorbent and of a hardnessconsiderably greater than that of varnished cardboard or paper, and astencil-sheet of dry but hygroscopic character having an attachmentstrip at one edge thereof, said attachment strip and carrier-sheethavingcooperating attachment devices.

17. In stenciling material, the combination of a carrier-sheet, flexibleand nonabsorbent and of a hardness considerably greater than that ofvarnished cardboard or paper, and a stencil-sheet having an attachmentstrip at one edge thereof, said attachment strip and carrier-sheethaving keyholeopenings and upwardly extending bent projections, adaptedto be inserted through said 0 enings, respectively.

18. n stenclling material, the combination of a flexible carrier-strip,a row of upwardly-extending' projections thereon, and an abutment stripthereon, and a stencilsheet-having openings through which saidprojections may extend and an edge adapted to, abut against said strip.

19. In stenciling material, the combination of a flexible carrier-strip,having a row of upwardly-extending projections thereon, a stencil-sheethaving openings through which said projections may extend, and aflexible protective strip secured at one ed 0 to said carrier-sheet andadapted normall y to lie over said projections.

20. In stenciling material, a celluloid carrier-sheet having meansthereon for the .ready'attachment thereto of a stencil sheet,

EDWARD W. HILL.

Witnesses:

JOSEPH TEAL, THOS. PINKNEY.

